ELECTROTHERMAL CO-PRODUCTION OF FERROSILICON, CALCIUM CARBIDE AND GASEOUS PHOSPHORUS FROM THE CHILISAY PHOSPHORITE
Shevko V.M. Uteyeva R.A. Badikova A.D.
2024Faculty of Metallurgy
Metalurgija
2024#63Issue 2271 - 274 pp.
The article presents the results of studies on the use of the high-silicon phosphorites (51,8 % of Ca3 (PO4)2, 25,6 % of SiO2) for the co-production of ferrosilicon, calcium carbide and gaseous phosphorus. The studies included the electric smelting a charge in an arc furnace and using the second-order rotatable designs. The conditions of producing FeSi45 ferrosilicon (51,2-54,2 % of coke, 12,5-18,4 % of steel shavings) and FeSi25 ferrosilicon (53-58 % of coke, 39,7-40 % of steel shavings) with extraction of 65-67,8 % of silicon into the alloy were determined. The second product of the process is technical calcium carbide with a capacity of 129-167 l/kg, in which from 44,8 to 64,1 % of calcium is extracted. At least 99,3 % of phosphorus during the electric smelting is sublimated.
calcium carbide , electrothermic process , ferrosilicon , gaseous phosphorus , phosphorite
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Higher School of Chemical Engineering and Biotechnology, M.Auezov South Kazakhstan University, Shymkent, Kazakhstan
Higher School of Chemical Engineering and Biotechnology
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